In construction, “redhead” or “wedge anchor” refers to a type of expansion anchor used to secure objects to concrete or masonry. Redheads are commonly used to fasten structural steel, handrails, and machinery to concrete surfaces. Proper selection, installation, and torque of redheads are essential for ensuring a secure and stable connection.
Function
The primary function of a redhead in construction is to provide a secure and stable connection between objects and concrete or masonry surfaces. Key aspects of the function of a redhead include:
- Attachment: Redheads attach objects to concrete or masonry surfaces, providing a secure and stable connection that withstands tension, shear, and other forces.
- Expansion: Redheads expand within the drilled hole, creating a tight fit and distributing the load over a larger area, preventing pull-out and ensuring the integrity of the connection.
- Corrosion Resistance: Redheads are made of corrosion-resistant materials, such as stainless steel or carbon steel with a zinc coating, ensuring durability and longevity in harsh environments.
Types of Redheads
There are several types of redheads commonly used in construction:
- Stainless Steel Redhead: Stainless steel redheads provide superior corrosion resistance and are ideal for outdoor and high -moisture applications.
- Carbon Steel Redhead: Carbon steel redheads are cost-effective and suitable for indoor and dry environments when corrosion resistance is not a primary concern.
- Zinc-Coated Redhead: Zinc-coated redheads provide corrosion resistance and are suitable for outdoor and moderate-moisture applications.
Applications
Redheads are used in a wide range of construction applications, including:
- Structural Steel: Redheads are used to fasten structural steel, beams, and columns to concrete or masonry surfaces, providing a secure and stable connection.
- Handrails and Guardrails: Redheads are used to attach handrails and guardrails to concrete steps, ramps, and walkways, ensuring safety and stability.
- Machinery and Equipment: Redheads are used to secure machinery, equipment, and fixtures to concrete floors, ensuring stability and preventing movement or vibration.
Installation
Proper selection, installation, and torque of redheads are essential for ensuring a secure and stable connection. Key aspects of the installation process include:
- Select the Right Redhead: Select the appropriate type, size, and material of redhead for the specific application and load requirements, ensuring compatibility and compliance with local regulations and standards.
- Prepare the Hole: Prepare the hole by drilling it to the proper depth and diameter, ensuring clean and debris-free conditions for proper redhead expansion and adhesion.
- Install the Redhead: Install the redhead by inserting it into the hole, then driving or tightening it to the specified torque, ensuring proper expansion and secure attachment to the concrete or masonry surface.
Conclusion
Redhead, also known as a wedge anchor, is a type of expansion anchor used to secure objects to concrete or masonry. By providing a secure and stable connection, redheads ensure the integrity and safety of construction projects, including structural steel, handrails, and machinery.